Rename GrDrawingMgr::abandon to wasAbandoned & add a matching entry point to GrDrawingContext

src/gpu/GrDrawingManager.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawContext.h"
 #include "GrDrawingManager.h"
 #include "GrDrawTarget.h"
@@ skipping 40 matching lines @@
 }
 
 void GrDrawingManager::reset() {
     for (int i = 0; i < fDrawTargets.count(); ++i) {
         fDrawTargets[i]->reset();
     }
     fFlushState.reset();
 }
 
 void GrDrawingManager::flush() {
-    if (fFlushing || this->abandoned()) {
+    if (fFlushing || this->wasAbandoned()) {
         return;
     }
     fFlushing = true;
 
     SkDEBUGCODE(bool result =)
                         SkTTopoSort<GrDrawTarget, GrDrawTarget::TopoSortTraits>(&fDrawTargets);
     SkASSERT(result);
 
 #if 0
     for (int i = 0; i < fDrawTargets.count(); ++i) {
@@ skipping 82 matching lines @@
             fSoftwarePathRenderer = new GrSoftwarePathRenderer(fContext);
         }
         pr = fSoftwarePathRenderer;
     }
 
     return pr;
 }
 
 sk_sp<GrDrawContext> GrDrawingManager::drawContext(sk_sp<GrRenderTarget> rt,
                                                    const SkSurfaceProps* surfaceProps) {
-    if (this->abandoned()) {
+    if (this->wasAbandoned()) {
         return nullptr;
     }
 
 
     bool useDIF = false;
     if (surfaceProps) {
         useDIF = surfaceProps->isUseDeviceIndependentFonts();
     }
 
     if (useDIF && fContext->caps()->shaderCaps()->pathRenderingSupport() &&
         rt->isStencilBufferMultisampled()) {
         GrStencilAttachment* sb = fContext->resourceProvider()->attachStencilAttachment(rt.get());
         if (sb) {
             return sk_sp<GrDrawContext>(new GrPathRenderingDrawContext(
                                                         fContext, this, std::move(rt), 
                                                         surfaceProps,
                                                         fContext->getAuditTrail(), fSingleOwner));
         }
     }
 
     return sk_sp<GrDrawContext>(new GrDrawContext(fContext, this, std::move(rt), surfaceProps,
                                                   fContext->getAuditTrail(),
                                                   fSingleOwner));
 }